"What item of clothing was the emphasis on? What is the most risky piece of clothing?"/"Underpants... The insides, the crotch."

From "Russian opposition leader Alexey Navalny dupes spy into revealing how he was poisoned" (CNN).Toxicologists consulted by CNN say that if applied in granular form to clothes, the [lethal nerve agent] Novichok would be absorbed through the skin when the victim begins to sweat....